CS61884 datasheet(37/72 Pages) CIRRUS

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CS61884

DS485PP4

14.13 Digital Loopback Reset Register (0Ch)

14.14 LOS/AIS Mode Enable Register (0Dh)

14.15 Automatic TAOS Register (0Eh)

[3:0]

A[3:0]

The G.772 Monitor is directed to a given channel based on the state of the four least signifi-

cant bits of this register. Register bits default to 00h after power-up or reset. The follow-

ing table shows the settings needed to select a specific channel’s receiver or transmitter to

perform G.772 monitoring.

A[3:0]

Channel Selection

0000

Monitoring Disabled

0001

RX Channel #1

0010

RX Channel #2

0011

RX Channel #3

0100

RX Channel #4

0101

RX Channel #5

0110

RX Channel #6

0111

RX Channel #7

1000

Monitoring Disabled

1001

TX Channel #1

1010

TX Channel #2

1011

TX Channel #3

1100

TX Channel #4

1101

TX Channel #5

1110

TX Channel #6

1111

TX Channel #7

BIT

NAME

Description

[7:0]

DLBK 7-0

Setting register bit n to “1” enables the digital loopback for channel n. Refer to Digital Loop-

back (See Section 12.3 on page 30) for a complete explanation. Register bits default to

00h after power-up or reset.

BIT

NAME

Description

[7:0]

LAME 7-0 T1/J1 MODE - These bits are “Do Not Care”, T1.231 Compliant LOS/AIS already used.

E1 Mode - Setting bit n to “1” enables ETSI 300 233 compliant LOS/AIS for channel n; set-

ting bit n to “0” enables ITU G.775 compliant LOS/AIS for channel n. Register bits default to

00h after power-up or reset.

BIT

NAME

Description

[7:0]

ATAO 7-0

Setting bit n to “1” enables automatic TAOS generation on channel n when LOS is detected.

(Continued)

BIT

NAME

Description

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